We want to update code that fetches from `threads` or `roles` to appropriately also fetch `roles.special_role` so we can include it in the return object. For now, I will leave in the `r.special_role = ${specialRoles.DEFAULT_ROLE} AS is_default` since I'm intermediately leaving in the `isDefault` property in `RoleInfo`. Towards the end of the stack, I will remove this check alongside the property as mentioned in the Linear task.
This diff handles `role-fetchers.js`
Part of [[ https://linear.app/comm/issue/ENG-5994/introduce-specialrole-field-in-roleinfo | ENG-5993 ]]
Depends on D10105